USGS Centroid Moment Solution
OFF COAST OF AISEN, CHILE
12/11/13 04:31:27.32 Epicenter: -45.744 -77.142 MW 6.1 USGS CENTROID MOMENT TENSOR 12/11/13 04:31:46.90 Centroid: -45.730 -76.791 Depth 10 No. of sta: 38 Moment Tensor; Scale 10**18 Nm Mrr=-0.10 Mtt= 0.56 Mpp=-0.46 Mrt=-0.91 Mrp=-0.07 Mtp=-1.25 Principal axes: T Val= 1.70 Plg=23 Azm=209 N -0.15 56 81 P -1.55 24 310 Best Double Couple:Mo=1.6*10**18 NP1:Strike= 80 Dip=89 Slip=-146 NP2: 349 56 -1
The figure above shows a visual representation of the style of faulting (focal mechanism) derived from the estimated moment tensor. Shaded areas show quadrants of the focal sphere in which the P-wave first-motions are away from the source, and unshaded areas show quadrants in which the P-wave first-motions are toward the source. The dots represent the axis of maximum compressional strain (in black, called the "P-axis") and the axis of maximum extensional strain (in white, called the "T-axis") resulting from the earthquake.